What surgery would I need to fix this asymmetry? (Photo)

You may need upper blepharoplasty or ptosis surgery or both. Need more detailed evaluation to determine.

Based on your photos, you appear to have an asymmetry of both your left upper eyelid and left eyebrow. I suspect a bit of Botox to lower your left eyebrow, may also lead to a more symmetrical upper eyelid appearance without requiring surgery. Thank you for your question and I hope this is helpful! Sincerely, Dr. Joseph

Thank you for sharing your question and posting your photos. You are not as asymmetric as you feel. Unilateral blepharoplasty might be your best option. Schedule consultation with an experienced oculoplastic surgeon for comprehensive evaluation and treatment.
Good luck!

Everyone is asymmetric to some degree. Based on the submitted photos it does appear there is some asymmetry to the upper eyelid, but there is asymmetry to the brow as well. You may find improvement to the eyelid by first treating the brow. This can be done with Botox by an experienced injector.